Six roofing calculators, one engine.
Start with the full material take-off, or jump to a focused tool.
Roofing Material Calculator
Build a roof section by section and get a complete material take-off: shingle bundles, starter strip, ridge cap, underlayment, drip edge, and nails. Free, no sign-up.
Roof Area Calculator
Convert your roof footprint and pitch into true surface area in square feet, square metres, and roofing squares.
Roof Pitch Calculator
Enter pitch as rise over 12, an angle in degrees, or a percentage — get all three plus the slope multiplier used to size materials.
Shingle Bundle Calculator
Turn roof squares into shingle bundles for 3-tab or architectural shingles, with adjustable bundle coverage.
Underlayment Calculator
Estimate rolls of 15 lb felt, 30 lb felt, or synthetic underlayment from your roof area.
Roof Cost Estimator
Multiply your roof squares by your own price per square. No fabricated regional pricing — you supply the rate.